Drawing instrument



FIG. 1 is a top plan view of the drawing instrument showing our new design;

FIG. 2 is a right edge elevational view thereof;

FIG. 3 is a left edge elevational view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a front elevational view thereof, the side opposite being substantially a mirror image. 

The ornamental design for a drawing instrument, as shown and described. 